Receive Lna Distribution Unit (Rldu); Cabinet-Top E1 Interface - Huawei Airbridge cBTS3612 Maintenance Manual

On-site Maintenance Manual
Airbridge cBTS3612 CDMA Base Station

6.2 Receive LNA Distribution Unit (RLDU)

For details about the RLDU switches, please see Table 6-2.
Table 6-2 Description of RLDU switches
Switch name
S/W

6.3 Cabinet-Top E1 Interface

Description of cabinet-top E1 interface
I.
Two transmission cables (corresponding to two BCIMs, each
containing 8 E1 trunk cables, which is numbered individually) run
from the backplane of the baseband subrack to the cabinet top and
connect to the two E1 BESPs (facing the cabinet and standing in
column) via the DB37 connectors. Generally the BCIM No.0
corresponds to the BESP in the front, and the BCIM No.1
corresponds to the BESP at the back.
Each BESP has two DB25 connectors, and each DB25
connector has 4 E1 trunk cables. According to our actual needs, we
Function
Switching the
number of the
sector carrier to
which the RLDU
corresponds.
Operation
S/W set to 0:
When the BTS sector number is less than or
equal to 3, the carrier number of each sector is
greater than or equal to 2 but less than or
equal to 4, and each sector is equipped with 2
CDUs or 1 CDU & 1 DFU.
S/W set to 1:
The carrier number of each sector is less than
or equal to 2, and each sector is equipped with
1 CDU or 1 DFU or 1 DDU.
6-3
Chapter 6 Switches &
Interfaces